Thermal fuse for convection heater

Hi.
My Convector heater (Delonghi DH15, 110V, 750/1500W with fan) need to replace the thermal fuse(one time cut-off type).
The problem is the marking on the fuse is too dark to read, manufacturer does not supply the parts anymore.
Any one have idea what cut off temp should it be?
I believe any convector heater with similar specification should use similar fuse with temperature range.